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Nexperia USA Inc. BZX384-B10-QX
- Part No.:
- BZX384-B10-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-B10-QX.pdf
- Description:
- DIODE ZENER 10V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:9,774
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Product details
Overview
BZX384-B10-QX from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 10 V nominal breakdown voltage at 5 mA, 300 mW total power dissipation, and qualified to AEC-Q101 for automotive voltage reference and overvoltage protection circuits.
For engineers reviewing the BZX384-B10-QX datasheet, BZX384-B10-QX pinout, BZX384-B10-QX application, or BZX384-B10-QX equivalent, this page delivers verified Zener voltage, differential resistance, temperature coefficient, reverse current limits, and automotive qualification status - all critical for precision biasing, ESD-clamped supply rail stabilization, and low-power analog reference design.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining stable 10 V output across load variations by conducting reverse current above its specified Zener knee voltage. Its ±2 % tolerance ensures tighter regulation than standard ±5 % Zeners, while AEC-Q101 qualification confirms robustness under automotive thermal cycling and humidity stress.
Designed for surface-mount use on FR4 PCBs with single-sided copper, it exhibits 150 °C maximum junction temperature, 415 K/W junction-to-ambient thermal resistance, and non-repetitive peak reverse power handling up to 40 W for transient suppression - enabling reliable operation in engine control units and infotainment power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.80 V to 10.20 V at IZ = 5 mA - defines precise clamping threshold for 10 V rail regulation |
| Differential Resistance (rdif) | 150 Ω max at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Reverse Current (IR) | 20 μA max at VR = 7.6 V - ensures low leakage below breakdown, critical for battery-powered standby circuits |
| Temperature Coefficient (SZ) | +0.2 mV/K min to +8.0 mV/K max - quantifies voltage drift per degree Celsius, enabling thermal error budgeting |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - sets continuous DC power limit on standard FR4 layout |
| Non-repetitive Peak Power (PZSM) | 40 W for tp = 100 μs - supports surge immunity in automotive load-dump transients |
| Junction Temperature (Tj) | −65 °C to +150 °C - enables operation in under-hood environments without derating |
Pinout & Package
Package: SOD323 (SC-76), 2-pin surface-mount plastic package with cathode marked by bar; footprint optimized for reflow and wave soldering per Nexperia's recommended land patterns.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity mark aligns with PCB silkscreen bar for automated optical inspection |
| 2 | Anode (A) | Connected to ground or lower-potential reference; forms shunt path for excess current during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock |
| ±2 % Zener voltage tolerance | Reduces binning requirements and eliminates post-production trimming in 10 V reference designs |
| Low 150 Ω dynamic impedance | Minimizes output voltage variation under changing load currents in feedback-sensing applications |
| 40 W non-repetitive surge rating | Withstands ISO 7637-2 Pulse 1 and Pulse 2a transients without degradation in vehicle ECUs |
| SOD323 footprint compatibility | Enables high-density placement and automated assembly with industry-standard pick-and-place equipment |
Applications
| Automotive Engine Control Unit (ECU) Reference | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Providing stable 10 V reference for analog-to-digital converter (ADC) biasing in engine knock sensor interface circuitry. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise input range for 12-bit ADC sampling. Use Value: ±2 % tolerance and +0.2 to +8.0 mV/K temperature coefficient enable <1 LSB error across −40 °C to +125 °C operating range. |
Use Scenario: Regulating excitation voltage for bridge-based pressure transducers in factory automation systems. IC Role / Device Role / Timing Role: Low-noise Zener source supplying constant 10 V to Wheatstone bridge arms. Use Value: 150 Ω differential resistance ensures <0.15 % line regulation error under 1 mA bridge current variation. |
| Consumer Audio Power Supply Clamp | Medical Portable Device Overvoltage Protection |
Use Scenario: Clamping 12 V DC-DC converter output to prevent amplifier IC damage during transient overshoot. IC Role / Device Role / Timing Role: Fast-response shunt protector absorbing short-duration surges exceeding 10.2 V. Use Value: 40 W non-repetitive peak power rating handles 100 μs load-dump spikes without parametric shift. |
Use Scenario: Protecting lithium-ion battery management IC inputs from accidental 15 V adapter misconnection. IC Role / Device Role / Timing Role: Primary overvoltage limiter placed before linear regulator input stage. Use Value: 20 μA max reverse leakage at 7.6 V prevents standby current drain exceeding 1 μA in sleep mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B10 | Same electrical specs but non-automotive grade; lacks AEC-Q101 qualification and traceability documentation | Restricted to commercial-grade consumer electronics where automotive reliability is not mandated | Select when cost sensitivity outweighs long-term field reliability requirements in non-automotive programs |
| MMSZ5240B-TP | ±5 % tolerance (9.5–10.5 V), higher 175 Ω rdif, no AEC-Q101 certification, same SOD-123 package | Acceptable for general-purpose 10 V biasing where ±2 % accuracy and automotive qualification are unnecessary | Choose only for cost-driven industrial controls with ambient temperature <85 °C and no transient immunity requirement |
Compared with BZX384-B10-QX, BZX384-B10 omits automotive qualification documentation and MMSZ5240B-TP trades tighter tolerance and surge capability for lower unit cost - making the QX variant essential for safety-critical automotive voltage references requiring guaranteed parametric stability over lifetime.
Availability
BZX384-B10-QX is available at Aetrix Electronics and suitable for automotive engine control units, industrial sensor signal conditioning, consumer audio power supply clamping, and medical portable device overvoltage protection requiring stable component supply with full AEC-Q101 traceability.
Supply support for BZX384-B10-QX includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Nexperia is a global semiconductor expert delivering high-performance logic, discrete, and MOSFET devices with emphasis on automotive, industrial, and mobile applications.
The BZX384-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for precision voltage reference and transient protection in harsh-environment automotive electronics.
FAQ
What is the maximum continuous reverse current the BZX384-B10-QX can handle at 25 °C ambient?
The device supports up to 250 mA forward current, but as a Zener diode operating in reverse breakdown, its continuous reverse current is limited by power dissipation. At 25 °C ambient and 10 V Zener voltage, the absolute maximum continuous reverse current is 30 mA (300 mW ÷ 10 V), assuming no PCB thermal enhancement beyond the standard FR4 test condition.
Does the BZX384-B10-QX require external series resistance in typical regulator configurations?
Yes - a current-limiting resistor is mandatory to set the Zener operating current between 5 mA (for specified VZ) and the 30 mA maximum derived from Ptot. For example, with a 12 V supply and 10 V output, a 68 Ω resistor delivers ~29.4 mA, staying within thermal limits while ensuring stable regulation under load variation.
How does the temperature coefficient affect regulation accuracy over −40 °C to +125 °C?
With a specified SZ range of +0.2 to +8.0 mV/K, the worst-case voltage drift is +1.0 V (8.0 mV/K × 125 K) above nominal 10 V at maximum temperature - resulting in a potential 11.0 V upper bound. Designers must account for this in ADC reference or comparator threshold calculations to avoid functional errors.
Can BZX384-B10-QX be used in parallel for higher power dissipation?
No - Zener diodes exhibit negative temperature coefficients at low voltages and positive above ~5.6 V, causing current hogging and thermal runaway when paralleled. The BZX384-B10-QX's +0.2 to +8.0 mV/K coefficient makes forced current sharing impractical; use a single higher-power Zener or active regulation instead.
BZX384-B10-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX384-Q
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 10 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 20 Ohms
- Current - Reverse Leakage @ Vr:
- 200 nA @ 7 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX384-B10-QX FAQ
1.How can I place an order for BZX384-B10-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-B10-QX on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for BZX384-B10-QX reliable?
The price and inventory of BZX384-B10-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-B10-QX is usually 5 days.
3.What payment methods are accepted for BZX384-B10-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-B10-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-B10-QX?
BZX384-B10-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-B10-QX order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for BZX384-B10-QX?
For technical support, including BZX384-B10-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-B10-QX requirements.
6.How does Aetrix verify that BZX384-B10-QX is sourced from the original manufacturer or authorized distributors?
All BZX384-B10-QX products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BZX384-B10-QX meets industry standards.
7.What is the process for return or replacement of BZX384-B10-QX?
All BZX384-B10-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-B10-QX, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The BZX384-B10-QX part is unused and in its original packaging.
Return procedure for BZX384-B10-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-B10-QX Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
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